Shears.



J. O. SOOGGINS.

SHBARS.

APPLICATION FILED FEB. 1, 1913.

Patented June 30, 1914,

2 SHBETS-BEEBT 1.

. mlll aim WIT ESSFS lNVENTO/B Allaruey JESSE C. SGOGGINS, 0F WICHITA, KANSAS.

SHEARS.

Specificationof Letters latent.

Application filed February 1, 1913.. Serial No. 745,695.

To all whom it may concern Be it known that 1, Jesse G. Scocoms, a citizen of the United States, residing at lVichit-a, in the county of Sedgwick and State of Kansas, have invented new and useful Improvements in Shears, of which the following is a specification...

This invention relates to tools and more particularly to that class of tools known as splitting and trimming shears which are used in cutting sheet, iron and similar metals.

The primary object of this invention is the provision of shears of this nature so constructed that they will cut metal of much greater thickness and tensile strength,

with less exertion on the part of the operator thereof than the ordinary shears. This object is obtained by providing the movable cutting blade of the shears With a double compound leverwhereby the leverage or cutting power of the shears will be greatly increased. Thus, the energy transmitted to the shears will be increased a number of times and metal of much greater thickness and tensile strength may be easily and neatly sheared with shears of much less weight than the ones now in use.

Another object of this invention is to pro vide a device of this nature with means whereby the king pin or pivoting bolt will be relieved of the majority of the strain occasioned by the splitting or trimming of metal.

A still further objectpf this invention is to provide the shears with a raised bearing back of the pivoting bolt by which the tension upon the cutting knives is tightened or loosened as desired and whereby the metal which is being cut is prevented from doubling down between the knives.

Among the many other objects of this invention is to provide shears of this nature with removable cutting blades so that: the same may be easily sharpened whenthey become dull; old ones may be easily and convcniently replaced by new ones when they become worn, etc., and to construct a the In describing the invention indetail, reference will be had to the accompanying drawings whereinlike characters of reference designate like or corresponding parts throughout the several views, and which Figure 1 is a side elevation of the device showing the cutting blades opened. Fig. 2 is a side elevation view of one of the cutting blades and the various other parts formed integral therewith. Fig. 3 is a top plan view of the device. Fig. 1 is a cross sectional view on the line 4--l of Fig. 3, and Fig. 5 is a detail sectional view through one of the cutting blades and the attachment therefor.

In referring to the drawin s by numeral 1 and 2, designate the blades of the shears which are pivotally connected at by means of the bolt. or king pin 1.

In the drawings is illustrated the type of shear known as a bench shear or in other words, shears which have one of the blades thereof securely fastened to a bench or the like but it is to be understood that in practical fields, the, novel features of this invention maybe applied to shears of any type or structure and are not to be limited to this special or specific type of shears.

The blade 1 of the type of shears which is illustrated in the drawings has projecting laterally from the lower side thereof the extension 5 and a lug 6 which extends downwardly from the blade 1 and the extension 5. The extension 5 is provided with a plurality. of holes 7 through which are inscrgd bolts or any suitable means for attach 'g the blade 1 ton bench (not shown) or the like and the lug 6 abuts one edge of the bench (not shown) and aids in holding the shears rigidly in place. A second lug 8 which is simple in construction and serves a purpose identical with that of the lug (i is formed integral with and extends downwardly from the extreme end 8) of the blade 1 and a projccticm 10 extends upwardly from the end 9. The upper end 1.1 of the extension 10 is provided with an opening 12 which passes therethrough and in which is seated the bolt or pivoting member 13.

Mounted upon the pivoting pin 13 is a bell crank 14 which has the portion where the two arms meet enlarged and provided with an. aperture through which the bolt 14 extends. Pivotally mounted upon the outer end of the arm 15 of the bell crank 14: is a flat metallic member 16 which is in turn Patented J line 30, 1914.

Q awa ts;

pivotally connected at 1,1 tolth e outenend of; the blade 2 of the shears. Pivotally mount: ed upon the outer end 18 of the arm 19;: of the crank arm 14: is a metal bar 20 which. is in turnv connected at 21 to the lever 22.

The lever 22 is pivotally mounted at 23 to the extension 24 which is formed'inte' g' ral with the portion 25 of the blade 1. This portion-25 of the blade 1 is pecu'liarly-shaped as is clearly shown in Fig. 2- ofthe drawings and has a lug 26 formed integral with and; extending inw-arcllyfrt m its; inner surface the purpose of which will be hereinafter more fully set forth.

The upper end? 27; ofthe lever arm 22 is shaped so as to be easily gripped by the hand of the person (not shown) who is op erating the machine and the main body portion of the lever 22-is'provided with a series of openings 28. Ea'ch'of these openings 28 is adapted to receive the pin '29; with which the lever 20 is pivotally'connected to the lever 22 and form a means whereby the leverage of the cutting blade 2 may be varied to suit the requirements. a i A lug 30 is formed integral with and ex-v tends inwardly from the portio'nf25 of the; blade 1 and is provided. with an aperture;

extending therethrough inwhich is mounted the pivoting boltor'ki-ng pint. The lug- 30- extends' through an opening 31 in the; blade 2 ofi theshears and forms a means upon which the bia'de 2- is pivotally mountedQ As a means for tightening or looseningthe tension of the two blades 1 and 2 of the; shears; a flat metallic piece 33 which is con; structed preferably of spring'sheet metal is secured at 3 4 to-the projection 24; and is% mounted upon the outer end of the pivoting: pin l: The'member 33' normally stands in a position as is shown in Fig. 3' of the' draw-l ings not contacting with the outer surface of'the blade 2 but spaced a slight distance therefrom, this allows loose free movement ofthe blade 2}. hen it is desired toincrease or tighten the tension of the two blades the nut 35 on the end of the bolt 4: is: tightened thus drawing the end 36 of the metallic member 33 into engagement with the outer surface of the blade 2;and forcingthe two blades closer into contact and tight-1' ening the tension of the same. The lug 26, is engaged by the inner surface 87 of the; blade. 2' and forms a bearing for the same.

' The outer extreme ends 38 and 3 9 ofithe. blades land 2 have the'cutting blades 40. and 41; secured thereto by means of-bolts orl any suitable securing means 43. By pro-v viding cutting edges which are made of; separate pieces of 'tempere'd steel the advantages (if-this pair'- of shears are greatly increased in thatwhen the blades become 1 d u l l they may be, easily removed to be sharp en'ed orwhen their usefulness has been im- 'jlQEhlI'GCl, the same may be removed and a new lever 21 in the same direction and draws the end 18 of the arm. 19: of the bell crankl in the same direction raising the. arm 15 upwardly; This raising of the arm 15 upward ly also raises the. end 455 of the blade 2 through the medium'of the member 16. The blade 2 being pivotally mounted at 3 upon thelug30 the end 39 thereof which has the cutting blade 41 attached thereto is moved downwardly and into engagement with the piece of sheet metal (not shown) which is -i'nserted in the opening A. The forcing a downward of this cutting blade 41 will either trim or split the sheet metal as desired;

From the construction and leverage sysitem employed in this invention it will be readily seen that the same amount of'energy transmitted to the shears will do work of far greater magnitude than an equivalent amount of energy would do if applied to the :shearsnow commonly found in use.

In practical use, certain minor features of -constr'uction, combination and arrangement of parts may necessitate alterations to. which the patentee is entitled provided such alter- ;ations are comprehended within the scope of wha-t is claimed. 1

What is claimed is E In a device of the characterdescribed, a support comprising a stationary jaw formed gupon the upper outer edge of said support, lilIL'QXlSQIlSlOD. formed upon said: support adj'a'centth'e inner edge of said jaw, a bearing rib formed upon said extension,- a standard formed upon the inner end or said support, 'a supporting bracket secured to the upper end of said extension, a movable jaw pivotfial ly mounted between said extension and said bracket, said movable jaw bearing against said bearing rib and said? standard, and means carried by said extension and said standard for operating said movable "jaw, substantially as described, and for the purpose set forth.

JESSE G. SCOGGINS. WVitnesses BEN AMIN Dnvonn "FRANK 6-. SNELL.

M ra has tau t ar. be ebt aedt i ta r ressing the flommissionfir of same,

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